diff --git a/Ample/MediaViewController.m b/Ample/MediaViewController.m
index 5e1f2c1..96681ac 100644
--- a/Ample/MediaViewController.m
+++ b/Ample/MediaViewController.m
@@ -163,7 +163,7 @@
         [item setIndex: ix];
         [item setValid: ix < _validCount];
         
-        [view reloadItem: item];
+//        [view reloadItem: item];
         
         ++ix;
     }
@@ -201,21 +201,33 @@
 }
 
 -(void)prepareView: (TablePathView *)view {
+    
+    NSValueTransformer *t;
+    NSDictionary *options;
+    
     NSPathControl *pc = [view pathControl];
     NSButton *button = [view ejectButton];
 
     [pc unbind: @"value"];
+    [pc unbind: @"enabled"];
     [pc bind: @"value" toObject: self withKeyPath: @"url" options: nil];
+    [pc bind: @"enabled" toObject: self withKeyPath: @"valid" options: options];
     
     [button unbind: @"enabled"];
-    NSValueTransformer *t = [NSValueTransformer valueTransformerForName: NSIsNotNilTransformerName];
-    NSDictionary *options = @{ NSValueTransformerBindingOption: t};
+    [button unbind: @"contentTintColor"];
+    t = [NSValueTransformer valueTransformerForName: NSIsNotNilTransformerName];
+    options = @{ NSValueTransformerBindingOption: t};
     [button bind: @"enabled" toObject: self withKeyPath: @"url" options: options];
     
-        
+    t = [NSValueTransformer valueTransformerForName: @"ValidColorTransformer"];
+    options = @{ NSValueTransformerBindingOption: t};
+    [button bind: @"contentTintColor" toObject: self withKeyPath: @"valid" options: options];
+   
+#if 0
     NSColor *tintColor = nil;
     if (!_valid) tintColor = [NSColor redColor];
     [button setContentTintColor: tintColor];
+#endif
 }
 
 -(CGFloat)height {
@@ -223,7 +235,8 @@
 }
 
 -(void)invalidate {
-    _valid = NO;
+    if (!_valid) return;
+    [self setValid: NO];
 }
 @end
 
@@ -391,6 +404,7 @@ static NSString *kDragType = @"private.ample.media";
     if (!ident) return nil;
     NSTableCellView *v = [outlineView makeViewWithIdentifier: ident owner: self];
     [(id<MediaNode>)item prepareView: v];
+    [v setObjectValue: item];
     return v;
 }
 
diff --git a/Ample/Transformers.h b/Ample/Transformers.h
index 5831fb1..fa0ac74 100644
--- a/Ample/Transformers.h
+++ b/Ample/Transformers.h
@@ -13,11 +13,12 @@ void RegisterTransformers(void);
 NS_ASSUME_NONNULL_BEGIN
 
 @interface FilePathTransformer : NSValueTransformer
-
 @end
 
 @interface FileSizeTransformer : NSValueTransformer
+@end
 
+@interface ValidColorTransformer : NSValueTransformer
 @end
 
 
diff --git a/Ample/Transformers.m b/Ample/Transformers.m
index db07232..49da1db 100644
--- a/Ample/Transformers.m
+++ b/Ample/Transformers.m
@@ -8,6 +8,8 @@
 
 #import "Transformers.h"
 
+#import <AppKit/NSColor.h>
+
 @implementation FilePathTransformer
 
 + (Class)transformedValueClass {
@@ -55,6 +57,22 @@
 @end
 
 
+@implementation ValidColorTransformer
++ (BOOL)allowsReverseTransformation {
+    return NO;
+}
++ (Class)transformedValueClass {
+    return [NSColor class];
+}
+
+- (id)transformedValue:(id)value {
+    BOOL valid = [(NSNumber *)value boolValue];
+    return valid ? nil : [NSColor redColor];
+}
+
+@end
+
+
 
 void RegisterTransformers(void) {
     
@@ -65,4 +83,6 @@ void RegisterTransformers(void) {
     t = [FilePathTransformer new];
     [NSValueTransformer setValueTransformer: t forName: @"FilePathTransformer"];
 
+    t = [ValidColorTransformer new];
+    [NSValueTransformer setValueTransformer: t forName: @"ValidColorTransformer"];
 }